title: The effect of interferon beta-1a on spasticity in primary progressive multiple sclerosis.
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D018450:Disease Progression; D004311:Double-Blind Method; D006801:Humans; D007273:Injections, Intramuscular; D000068556:Interferon beta-1a; D016899:Interferon-beta / Q000494:pharmacology*; D009103:Multiple Sclerosis / Q000150:complications*; D009128:Muscle Spasticity / Q000188:drug therapy* / Q000209:etiology*; D010919:Placebos; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000276:Adjuvants, Immunologic; D010919:Placebos; D016899:Interferon-beta; D000068556:Interferon beta-1a